#!/usr/bin/node

const log = console.log;

let buf1 = new Buffer(256);

buf1[0] = 0;

log(`buf1.length:${buf1.length}\n`);
log(buf1);

//通过循环，来初始化buffer中的每个字节
for(let i = 0;i<buf1.length;i++){
  buf1[i] = i;
}
log('\nbuf1:',buf1);

//类似数组，对buffer做切片操作
let buf2=buf1.slice(250,256);
log('\nbuf2:',buf2);

//在buffer中填充数据，buffer数据转化成JSON数据
buf2.fill(0);
log('\nbuf2:',buf2);
log('\nbuf2',buf2.toJSON());

//用数组初始化buffer
let arr=['a',0xba,0xdf,0,255,10];
let buf3=new Buffer(arr);
log('\nbuf3',buf3);

//用字符串初始化buffer
let str  = 'hello world';
let buf4 = new Buffer(str);
log('\nbuf4',buf4);

//buffer数据复制
buf4.copy(buf3, 0, 0, buf4.length);
log('buf3',buf3);
